<template>
  <div class="login-container">
       <van-nav-bar class="page-nav-bar" title="登录" >
        <van-icon slot="left" name="cross" @click="$router.back()"/>
        </van-nav-bar>
        <van-form @submit="onSubmit" ref="loginForm">
          <van-field
            name="mobile"
            placeholder="请输入手机号"
            v-model="user.mobile"
            :rules="userFormRules.mobile"
            type="number"
            maxlength="11"
          >
          <i slot="left-icon" class="iconfont icon-shouji"></i>
          </van-field>
          <van-field
            name="code"
            placeholder="请输入验证码"
            v-model="user.code"
            :rules="userFormRules.code"
            type="number"
            maxlength="6"
          >
          <i slot="left-icon" class="iconfont icon-yanzhengma"></i>
           <template #button>
            <!-- time 倒计时时间 -->
                <van-count-down :time="1000 * 60" format="ss s" v-if="isCountDownShow" @finish="isCountDownShow = false"/>
                <van-button round class="send-sms-btn" size="small" type="default" @click="onSendSms" native-type="button" v-else>发送验证码</van-button>
           </template>
          </van-field>
          <div class="login-btn-warp">
            <van-button class="login-btn" block type="info" native-type="submit">登录</van-button>
          </div>
        </van-form>
  </div>
</template>

<script>
import { login, sendSms } from '@/api/user'
export default {
  name: 'LoginPage',
  components: {},
  props: {},
  data () {
    return {
      user: {
        mobile: '13911111111', // 手机号
        code: '246810', // 验证码
        duration: 0 // 默认持续时间 2000 为0持续展示
      },
      userFormRules: {
        mobile: [{ required: true, message: '手机号不能为空' }, { pattern: /^1[3|5|7|8]\d{9}$/, message: '手机号格式错误' }],
        code: [{ required: true, message: '验证码不能为空' }, { pattern: /^\d{6}$/, message: '验证码格式错误' }]
      },
      isCountDownShow: false // 是否展示倒计时
    }
  },
  computed: {},
  watch: {},
  created () {},
  mounted () {},
  methods: {
    async onSubmit () {
      // console.log(this.user)
      // 1.获取表单数据
      const user = this.user
      // 2.表单校验

      this.$toast.loading({
        message: '加载中...',
        forbidClick: true,
        duration: 0 // 持续时间 默认2000 0 表示持续展示
      })

      // 3.提交表单，请求登录
      try {
        const { data } = await login(user)
        this.$store.commit('setUser', data.data)
        this.$toast.success('登录成功')
        this.$router.back()
      } catch (err) {
        if (err.response.status === 400) {
          this.$toast.fail('手机号或验证码错误')
        } else {
          this.$toast.fail('登录失败,请稍后重试')
        }
      }
      // 4.根据请求响应结果 处理后续操作
    },
    async onSendSms () {
      // 1.验证手机号
      try {
        await this.$refs.loginForm.validate('mobile')
        // console.log('验证通过')
      } catch (err) {
        return console.log('验证失败', err)
      }

      // 2.验证通过，显示倒计时
      this.isCountDownShow = true
      // 3.请求发送验证码
      try {
        await sendSms(this.user.mobile)
        this.$toast('发送成功')
      } catch (err) {
        this.isCountDownShow = false
        if (err.response.status === 429) {
          this.$toast('发送太频繁了，请稍后重试')
        } else {
          this.$toast('发送失败，请稍后重试')
        }
      }
    }
  }
}
</script>

<style lang="less" scoped>
.login-container{
    .iconfont {
        font-size: 37px;
    }
        .send-sms-btn{
        background-color: #ededed;
        width: 152px;
        height: 46px;
        line-height: 46px;
        font-size: 22px;
        color: #666;
    }
    .login-btn-warp{
        padding: 53px 33px;
        .login-btn{
            background-color: #6db4fb;
            border: none;
        }
    }

}
</style>
